Different kanji that are pronounced "shin" (しん) are combined with the kanji for "one" (一, ichi, いち)" to give different names:

• 真一, "true, one"
• 信一, "belief, one"
• 伸一, "extend, one"
• 進一, "progress, one"
• 新一, "new, one"
• 慎一, "humility, one"
• 晋一, "advance, one"
• 紳一, "gentleman, one"
• 鎮一, "tranquilize, one"
• 愼一, "care, one"

• Shinichi Aoki (紳一, born 1965), Japanese professional Go player
• Shinichi Chiba (真一), also known as Sonny Chiba, a Japanese actor
• Shinichi Fujimura (新一, born 1950), Japanese amateur archaeologist
• Shin'ichi Hisamatsu (久松 真一, 1889–1980), Japanese Zen Buddhist scholar, philosopher and tea master
• Shinichi Honma (本間 信一, born 1934), Japanese ice hockey player
• Shinichi Hoshi (新一, 1926–1997), Japanese novelist and science fiction writer
• Shinichi Ikejiri (池尻 愼一, 1909–1945), Japanese physician and writer
• Shin'ichi Ishiwata (信一), Japanese scientist
• Shinichi Itoh (真一, born 1966), Japanese professional Grand Prix motorcycle road racer
• Shinichi Iwasaki (岩崎 伸一, born 1968), Japanese ice hockey player
• Shinichi Kitaoka (伸一, born 1948), Japanese professor of political science
• Shinichi Mori (進一, born 1947), Japanese enka singer
• Shinichi Ota (太田 真一, born 1975), Japanese cyclist
• Shinichi Sato (baseball) (佐藤 真一, born 1965), Japanese baseball player
• Shinichi Sato (footballer) (佐藤 真一, born 1975), Japanese footballer
• Shin'ichi Satō (shogi) (佐藤 慎一, born 1982), Japanese shogi player
• Shinichi Sekizawa (新一, 1921–1992), Japanese screenwriter
• Shinichi Shinohara (信一, born 1973), Japanese judoka
• Shinichi Suzuki (violinist) (鎮一, 1898–1998), Japanese violinist
• Suzuki Shin'ichi I (真一, 1835–1918), Japanese photographer
• Suzuki Shin'ichi II (真一, 1855–1912), Japanese photographer
• Shinichi Tanaka (田中 信一, born 1959), Japanese ski jumper
• Shin'ichi Tanaka (photographer) (田中 新一), Japanese photographer
• Shinichi Tomii (富井 慎一, born 1980), Japanese modern pentathlete
• Shinichi Tsutsumi (真一, born 1964), Japanese stage and screen actor
• Shinichi Watanabe (慎一, born 1964), Japanese anime director
• Wakakirin Shinichi (真一, born 1983), Japanese sumo wrestler
• Shinichi Osawa (伸一, born 1967), Japanese pop artist
• Shinichi Ishihara (born 1960), anison singer and anime voice actor
• Shinichi Morishita (born 1960), Japanese football player
• Shinichi Shuto (born 1983), Japanese football player

• Shinichi Kudō (新一) in the US Version named Jimmy Kudo, the main protagonist of the anime and manga series Case Closed (Detective Conan)
• Shin'ichi Akiyama, the male protagonist of the manga Liar game
• Shin'ichi Chiaki, the male protagonist of the manga Nodame Cantabile
• Shinichi Izumi, the protagonist of the anime and manga series Parasyte
• Shinichi Kuruma, The protagonist of the anime and manga series Majuu Sensen
• Shinichi Nagata, a recurring character in Sword Art Online.
• Shinichi, kitsune antagonist in the trilogy of books The Vampire Diaries: The Return
• Shinichi Namura is a character in Marmalade Boy. He is Meiko's teacher and secret lover in the manga and anime series.
• Shinichi Sakurai, the male protagonist of Uzaki-chan Wants to Hang Out!
• Shin'ichi Susuki, the protagonist of YOU and ME and HER: A Love Story